Cross bolt deadlock

ABSTRACT

A housing arranged to be mounted on a door hinged in a door frame, the housing having a cross bolt mounted therein for movement generally parallel to the adjacent edge of the door toward and away from locking engagement with a lug portion of a strike mounted on the door frame. The cross bolt is releasably held against movement by engagement of a moveable plunger thereon with a pair of spaced portions of the housing, and moved between locked and unlocked positions by a cam journalled in the housing, the cam engaging the plunger to move the same out of engagement with the engaged portion of the housing. A lock bolt is provided to prevent movement of the cross bolt by said cam.

United States Patent [191 Kartarik 1 1 CROSS BOLT DEADLOCK [75] Inventor: Henry Kartarik,White Bear Lake,

Minn.

[731 Assignee: Ideal Security Hardware Corporation, St. Paul, Minn.

[22] Filed: Sept. 30, 1971 [2]] Appl. No.: 185,152

[52] U.S. Cl 292/117, 70/104, 70/D1G. 32 [51] Int. Cl. E05c 1/06 [58] Field of Search 70/97, 99, 104, DIG. 32;

[ 51 July 17, 1973 Primary Examiner-Albert G. Craig, .lr. Attorney-Arthur E, Ringsrud et a1.

[57] ABSTRACT A housing arranged to be mounted on a door hinged in a door frame, the housing having a cross bolt mounted therein for movement generally parallel to the adjacent edge of the door toward and away from locking engagement with a lug portion ofa strike mounted on the door frame. The cross bolt is releasably held against movement by engagement of a moveable plunger thereon with a pair of spaced portions of the housing, and moved between locked and unlocked positions by a cam journalled in the housing, the cam engaging the plunger to move the same out of engagement with the engaged portion of the housing. A look bolt is provided to prevent movement of the cross bolt by said cam.

1 Claim, 5 Drawing Figures PATENTED JUL 7 3. 746 380 I NVENTOR.

8 jg HENR v K ART/q RIK PATENIED JUL 1 1 ma SHEET 3 [If 2 CROSS BOLT DEADLOCK SUMMARY OF THE INVENTION An important object of this invention is the provision of a deadlock that is proof against opening by means of a common jimmy.

Another object of this invention is the provision of a deadlock having a cross bolt moved by a cam rotating in opposite directions between a neutral position and angularly spaced operating positions.

Another object of this invention is the provision of a deadlock having a cross bolt, a cam operating the cross bolt, and a lock bolt operative to lock the cross bolt against operation by the cam.

To the above ends is provided; a cross bolt housing adapted to be secured to a hinged door adjacent a free edge of the door; a cooperating strike adapted to be mounted on a door frame adjacent the housing when the door is closed, the housing having a pair of notches therein for reception of a pair of lugs on the strike; and

a cross bolt including a body slidably mounted in the housing and a pair of aligned boltportions receivable in respective ones of a pair of aligned openings in the strike lugs. The body is provided with a transverse plunger disposed to engage spaced surface portions of the housing to hold the cross bolt against movement in opposite directions, and a cam is journalled in the housing and provided with means for rotating the same in opposite directions from a neutral position to a pair of angularly spaced positions wherein circumferentially spaced surface portions of the cam engage and move the plunger out of engagement with a respective one of the surface portions, and move the plunger and the cross bolt in one direction of cross bolt movement. A second cam, similar to the above-mentioned cam, has a hub by means of which it is journalled coaxially with the first mentioned cam, and is adapted to be rotated by a key from the opposite side of the door, independently of the first mentioned cam. A spring arrangement urges the cams toward a neutral position, and a lock bolt is operative to positively hold the cross bolt in a strike engaging locked position against cam imparted movement toward its strike released position.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary view in side elevation of a door and door frame with the deadlock of this invention mounted thereon;

FIG. 2 is an inlarged fragmentary section taken substantially on the line 2-2 of FIG. 1;

FIG. 3 is a fragmentary transverse section taken substantially on the line 3.-3 of FIG. 2;

FIG. 4 is a longitudinal section taken generally on the line 44 of FIG. 2, some parts being removed and some parts being broken away; and

FIG. 5 is a longitudinal section taken substantially on the line 5-5 of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In FIGS. 1 3 and 5, the conventional door is indicated generally at 1, it being assumed that the door 1 is hingedly mounted in the usual manner in a conventional door frame 2. The deadlock of this invention is mounted on the free edge portion 3 of the door I, said free edge portion being engaged by the usual stop strip 4 of the door frame 2, to limit closing movements of the door 1.

The present deadlock includes a housing indicated generally at 5, the housing 5 being formed to provide an outer or front wall 6 and a peripheral flange forming top and bottom side walls 7 and 8 respectively, and opposite end walls 9 and 10, the former of which is formed to provide a longitudinally outwardly projecting nose portion 11 having a pair of slot like openings 12 therein opening to the interior of the housing 5. As shown, the nose portion 11 projects laterally outwardly from the edge portion 3 of the door 1 and over a portion of the door frame 2, when the door is closed. A strike 13 includes a pair of spaced lugs 14 each being receivable in a different one of the slotlike openings 12 when the door is closed, these lugs 14 having axially aligned openings 15 extending therethrough. The lugs 14 are integrally fomled with a mounting flange 16 that is rigidly secured to the door frame 2 by a plurality of mounting screws or similar fastening elements 17.

A cross bolt 18 is mounted within the housing 5 for reciprocatory movement transversely thereof, and comprises a body 19, a pair of laterally spaced arms 20 projecting transversely of the body 19 and a pair of generally cylindrical bolt portions each projecting from a different one of the arms 20 in axial alignment within the nose portion 11, the bolt portions 21 each being positioned to be received in a different one of the openings 15 in the strike lug 14. The body 19 is formed to provide a pair of longitudinally spaced aligned lugs 22 that are longitudinally slidably received in a guide track 23 formed in the inner surface of the housing wall 6 and extending in a direction parallel to the aligned axis of the bolt portions 21. As shown, the cross bolt 18 is slidable between a release position shown in FIG. 4 and by full lines in FIG. 5, and a strike engaging position shown by broken lines in FIG. 5, wherein the bolt portions 21 span respective ones of the slot like openings 12 and are received in the openings 15 of the lugs 14.

The housing 5 further includes a removeable plate like inner wall 24 that is supported in spaced generally parallel relationship to the wall 6 by a pair of lugs 25 on the end wall 9, a lug 26 on the end wall 10, and a pair of legs 27 projecting inwardly from the outer or front wall 6. The legs 27 are provided with screw threaded axial openings for reception of anchoring screws 28 by means of which the inner wall 24 is secured within the housing 5. The inner wall 24 cooperates with the guide track 23 to keep the cross bolt 18 properly positioned with the housing 5.

lntennediate its opposite ends, the cross bolt body portion 19 is formed to provide a transverse channel 29 that is closed at one end adjacent the housing end wall portion 9 and which has an opposite open end. A plunger 30 is mounted in. the channel 29 for longitudinal sliding movements therein, and is provided with a coil compression spring 31 which abuts the closed end of the channel 29 and yieldingly urges the plunger 30 toward the opposite end wall 10 of the housing 5. A disk-like retainer 32 is secured in the cross bolt body portion 19 in overlying relationship to the plunger 30, to retain the plunger 30 within the channel 29. Further, the plunger 30 is provided with a flange 33 that engages the retainer member to limit spring biased movement of the plunger 30. Outwardly of the open end of the channel 29, the plunger 30 is provided with a head portion 34 having opposite flat sides that are adapted to engage opposite flat parallel sides of a lug 35 projecting radially outwardly from a hollow bearing boss 36 integrally formed with and extending inwardly from the outer wall 6 of the housing 5. When the plunger head 34 is disposed at one side of the lug 35, as shown in FIG. 4, the cross bolt 18 is releaseably locked in a release position, with the cross bolt portions 21 out of engagement with their respective strike lugs 14. When the plunger 30 is retracted against bias of its spring 31, the cross bolt 18 can be moved to its locked position wherein the cross bolt portions 21 are fully received in the openings in the strike lugs 14, after which movement of the plunger towards its extended position will dispose the head 34 thereof adjacent the opposite side of the lug 35 to positively hold the cross bolt 18 against sliding movement toward its release position.

The plunger 30 is retracted against bias of the spring 31 by a selected one of a pair of like earns 37 and 38, the former of which is secured to the inner end of a stem portion 39 of a knob 40, the stem portion 39 being journalled in the bearing boss 36 on an axis extending transversely to the door 1. The stem 39, at its inner end, has a pair of diametrically opposed key portions 41 disposed in cooperating key ways in the cam 37, the cam 37 peened or otherwise rigidly secured to the stem 39 for common rotation therewith. The knob 40 has an axially inner-end portion formed to provide a plurality of radially outwardly projecting lugs 42 that move circumferentially within a circular recess 43 in the outer surface of the housing wall 6. Each cam 37 and 38 has pairs of circumferentially spaced cam surface portions 44 and 45 that are adapted to engage the plunger head 34 to retract the same and move the plunger 30 together with the cross bolt 18 from one of its locked or released positions to the other thereof responsive to rotation of one of the cams, such as the cam 37, imparted thereto by rotation of the knob in a given direction.

The cams 37 and.38 are normally disposed in a neutral position of rotation thereof, as shown in FIG. 4 and by full lines in FIG. 5. The cam 37 is formed to provide a third cam surface 46 that is engaged by a cam fol- I lower member 47 mounted in a channel 48 defined by a pair of ribs 49 extending in laterally spaced parallel relationship between the housing end wall 10 and the bearing boss 36. The cam follower member 47 is provided with a pair of diametrically opposed flanges 50 each slidably engaging a different one of the ribs 49 to support the cam follower member 47 in the channel 48, the member 47 having another radially outwardly projecting flange 51 that is adapted to engage the adjacent surface of the inner wall 24 to prevent the cam follower member 47 from moving laterally outwardly of the channel 48. A coil compression spring 52 has one end portion disposed within a longitudinal recess 53 in the cam follower member 47, and its opposite end engaging the housing end wall 10 to yieldi'ngly urge the cam follower member'47 into engagement with the cam 37.

Thus, when the knob 40 is rotated to move the latch bolt 18 to either of its locked released positions, and released, the cam follower member 47 will rotate the cam 37 and knob 40 to the neutral position of the cam 37.

The housing 5 is mounted on the inner surface of the door I by means of a plurality of elongated screws 54 that extend through openings within the recess portion 43 of the outer wall 6 in circumferentially spaced relationship with respect to the knob 40. As shown particularly in FIG. 1 the mounting screws 54 are each disposed under a different one of the knob lugs 42 when the cam 37 is disposed in its neutral position. The housing 5 is disposed with the stem 39 of the knob 40 in axial alignment with a cross-sectionally rectangular lock spindle 55 that is mounted in a conventional cylinder lock plug 56 mounted in an escutcheon, commonly known in the trade as a cylinder rose, and indicated at 57, the cylinder rose 57 being mounted in an opening 58 extending transversely through the door 1. A pair of mounting screws 59 are screw threaded into the inner end of the lock plug 56in the usual manner, the screws 59 extending through a retainer plate 60 having an opening 61 through which the spindle 55 loosely extends, the retainer plate 60 engaging the inner surface of the door 1 adjacent the opening 58, and within the housing 5. Although not specifically shown, it will be appreciated at least a pair of the mounting screws 54 are screw threaded into the inner end of the cylinder rose 57 to securely lock the same within the opening 58, the other pair of screws 54 being screw threaded into the door 1, radially outwardly of the opening 58 therethrough. This arrangement is specifically disclosed in my copending application Ser. No. 179,443, filed Sept. 10, 1971, and entitled DOOR LOCK CYL- INDER ROSE.

The cam 38, like the cam 37, is provided with a central opening defining a pair of diametrically opposed key ways 62 that receive key portions 63 of a hub element 64 that is journalled in the inner wall 24 in axial alignment with the stem 39 of the knob 40. The hub element or portion 64 is provided with a cross-shaped axial opening 65 that receives the spindle 55, whereby the cam 38 is rotated in opposite directions from a neutral position like that of the cam 37, by means of a key, not shown, but insertable in the cylinder lock plug 56 from the exterior of the door. As above stated, the lock plug 56 is of well-known and commercially available construction, the same being rotatable in opposite directions from a neutral position, the neutral position being the only one which the key therefore may be inserted or removed. The lock plug 56, not in and of itself comprising the instant invention, further detailed and showing description thereof is omitted in the interest of brevity. It should sufice to state that, with the abovedescribed arrangement, the cross bolt 18 may be moved to its locked or released position from the outside of the door by means of a key inserted into the lock plug 56, and from the inside of the door by means of the knob 40 In either case, the earns 37 and 38 are moved to their neutral positions after the locking or releasing operations are completed.

A lock bolt 66 comprises a body portion 67 and a leg 68 projecting laterally outwardly from the body portion 67. The lock bolt 66 is slidably contained between the cross bolt 18 and the outer wall 6 of the housing 5, for movements generally radially of the bearing boss 36 transversely of the direction of movement of the cross bolt 18. The extended end of the leg 68 is tapered as indicated at 69, and is formed to provide a pair of opposite opening notches inwardly of the tapered end 69, see particularly FIG. 5. The lock bolt 66 is moveable toward and away from engagement of the tapered end 69 and notches 70 with a resilient generally C- shaped detent element 71 contained within a recess 72 in the bearing boss 36, adjacent the lug 35 thereof. It will be noted at the leg 68 extends between a pair of opposed shoulders 73 formed by the opposed inner ends of the cross bolt lugs 22 when the lock bolt 66 is moved in a direction to disengage the tapered end 69 from the detent 71. In this position of the lock bolt 66, the cross bolt 18 may be moved between its locked and released positions by either one of the cams 37 and 38. When the cross bolt 18 is moved to its locking or locked position, the lock bolt 66 may be moved laterally so that the notches 70 in the leg portion 68 are engaged by the detent 71. In this position of the lock bolt 66, the opposite ends of the body portion 67 thereof are disposed be tween the shoulders 73, the body portion 67 substantially filling the space between the shoulders 73. Means for moving the lock bolt 66 toward and away from engagement of the leg 68 with the detent 71 comprises a slide button 74 slidably mounted on a surface portion 75 of the outer wall 6 and having a shank 76 projecting transversely through an opening 77 in the housing wall 6; the shank 76 being formed to provide a reduced end portion 78 extending through an opening in the body portion 67 and peened thereover to rigidly secure the slide button 74 to the lock bolt 66. The opening 77 is of a width substantially equal to that of the shank 76, whereby to hold the body portion 67 against movement in the direction of movement of the cross bolt 18. Thus, when the lock bolt 66 is moved so that the body portion thereof is disposed between the shoulders 73 of the cross bolt lug 22, the cross bolt is positively locked against movement in a release direction by either the knob 40 or from the outside of door 1 by means of a key. Should an intended intruder obtain a key or pick the lock 56, the lock bolt 66 will still prevent the deadlook from being opened from the outside of the door.

It will'be noted that, when the door 1 is in a closed position, the strike mounting screws 17 are hidden by the nose portion 11. The mounting screws 54 of the housing 5 are also hidden at all times by the knob lugs 42 except when the knob 40 is being used to move the cross bolt 18 between its locking and releasing positions.

While I have shown and described a commercial embodiment of a cross bolt deadlock, it will be understood that same is capable of modification without departure from the spirit and scope of the invention, as defined in the claims.

What is claimed is:

l. A cross bolt deadlock comprising:

a. a housing adapted to be attached to a door hinged in a door frame and having adjacent side and outer wall portions defining notch means opening generally toward an adjacent portion of the door frame;

b. a strike adapted to be mounted on the door frame and having lug means disposed to be received in the notch means of the housing when the door is closed, said lug means having transverse opening means therethrough;

c. a cross bolt mounted in the housing for limited movements in opposite directions parallel to the plane of the door across said notch means and axially of said opening means in the strike when the door is closed, between locked and unlocked positions;

d. a plunger carried by said cross bolt for movements toward and away from locking engagement with said housing;

e. means yieldingly urging said plunger in a direction to engage said housing to releasably lock said cross bolt selectively at substantially opposite limits of movement thereof; i

f. a cam journaled in said housing for rotary movement in opposite directions from a given neutral position, said cam having a pair of circumferentially spaced cam surface portions engaging said plunger to move the same and said cross bolt in a different direction of movement of said cross bolt responsive to rotation of said cam in an opposite direction from said neutral position, and a third cam surface portion angularly spaced from said pair of cam portions; a

g. a cam follower element movably mounted in said housing for engagement with said third camsurface portion;

h. and spring means urging said cam follower element toward engagement with said third cam surface portion, whereby to urge said cam toward said neutral position thereof in all positions of said rotary movement of the cam away from said neutral position. t 

1. A cross bolt deadlock comprising: a. a housing adapted to be attached to a door hinged in a door frame and having adjacent side and outer wall portions defining notch means opening generally toward an adjacent portion of the door frame; b. a strike adapted to be mounted on the door frame and having lug means disposed to be received in the notch means of the housing when the door is closed, said lug means having transverse opening means therethrough; c. a cross bolt mounted in the housing for limited movements in opposite directions parallel to the plane of the door across said notch means and axially of said opening means in the strike when the door is closed, between locked and unlocked positions; d. a plunger carried by said cross bolt for movements toward and away from locking engagement with said housing; e. means yieldingly urging said plunger in a direction to engage said housing to releasably lock said cross bolt selectively at substantially opposite limits of movement thereof; f. a cam journaled in said housing for rotary movement in opposite directions from a given neutral position, said cam having a pair of circumferentially spaced cam surface portions engaging said plunger to move the same and said cross bolt in a different direction of movement of said cross bolt responsive to rotation of said cam in an opposite direction from said neutral position, and a third cam surface portion angularly spaced from said pair of cam portions; g. a cam follower element movably mounted in said housing for engagement with said third cam surface portion; h. and spring means urging said cam follower element toward engagement with said third cam surface portion, whereby to urge said cam toward said neutral position thereof in all positions of said rotary movement of the cam away from said neutral position. 